Client Application Callback Functions

The Windows Biometric Framework supports two types of callback signatures. Beginning with Windows 8, the following callback is supported. We recommend that you implement this callback for all new applications. This callback cannot, however, be used in Windows 7.

Callback	Description
PWINBIO_ASYNC_COMPLETION_CALLBACK	Notifies the client application that an asynchronous operation started by using WinBioAsyncOpenSession or WinBioAsyncOpenFramework has completed.

The following callback functions were introduced in Windows 7. We recommend that you do not implement them for new applications that target Windows 8 and later operating systems.

Callback	Description
PWINBIO_CAPTURE_CALLBACK	Returns results from the asynchronous WinBioCaptureSampleWithCallback function.
PWINBIO_ENROLL_CAPTURE_CALLBACK	Returns results from the asynchronous WinBioEnrollCaptureWithCallback function.
PWINBIO_EVENT_CALLBACK	Returns results from the asynchronous WinBioRegisterEventMonitor function.
PWINBIO_IDENTIFY_CALLBACK	Returns results from the asynchronous WinBioIdentifyWithCallback function.
PWINBIO_LOCATE_SENSOR_CALLBACK	Returns results from the asynchronous WinBioLocateSensorWithCallback function.
PWINBIO_VERIFY_CALLBACK	Returns results from the asynchronous WinBioVerifyWithCallback function.

Related topics

Client Application Reference